Hi kashani, on Monday, 2007-04-23 at 11:11:40, you wrote: > >It sounds like Gigabit Ethernet to me.
Yes, that's it. > Keep in mind that not all fastE or gigE switches support jumbo frames. > Additionally not all cards support jumbo frames either though you can > certainly set them to an MTU of 9000 and watch things break. I had that problem before with the Server's onboard Broadcom chip; fortunately it just breaks completely when you up the MTU :) Now I installed an Intel 82545GM card that officially supports jumbo frames and that I haven't heard anyone complain about. The clients all have the same 82547EI onboard chip. > To the original poster, I'd do some googling and verify that all the > network cards and switches involved can do jumbo frames and that it is > enabled on each device as needed. Check. The switches are HP ProCurve 2824 supporting up to 9216 bytes per frame, and I checked the config several times. Jumbo frames are enabled on all ports, and it's a rather basic config anyway, no VLANs 'n stuff, no voice LAN features, just switching. And for everything else but NFS locking it does work fine. A plain netcat from /dev/zero to /dev/null goes from some 35 MB/s at an MTU of 1500 to over 80, ssh does very well, and even NFS file operations other than locking work. I have googled for quite a while but can't find a thing. Anyone here using NFS and GigE+jumbo frames with Gentoo? cheers! Matthias -- I prefer encrypted and signed messages. KeyID: FAC37665 Fingerprint: 8C16 3F0A A6FC DF0D 19B0 8DEF 48D9 1700 FAC3 7665
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